I was wondering how I can filter my pool and return the water through my pool returns without returning water through the spa thus creating overflow into the pool. What I am wanting to test is if by reducing the spa overflow into the pool (aeration) I can keep my PH from rising. It seems that I am constantly having to lower my PH and Im wondering if the continued overflow during pump run times is causing the constant rise. I test my water daily via TF-100 in order to maintain higher FC due to pool stains My patience with my stains is wearing thin because they are migrating. Let me know what yall think.